交流变频电动钻机电控系统的完善

Improvement of the electric controlling system of variable frequency AC drive drilling rig

通过对新疆石油管理局在用的ZJ30DBT、ZJ50DB、ZJ70DB交流变频电动钻机在配套和应用中存在的电控系统标准不统一、绞车在大载荷时无法悬停、转盘倒转、控制系统容错冗余性能差、一体化钻井仪表参数滞后需频繁设置修改等问题的分析和研究,对9000m交流变频电动钻机及其它交流变频电动钻机电控系统进行了完善设计。实施了绞车电动机采用带编码器矢量闭环控制系统;转盘采用防倒转控制和取心稳速控制;控制系统采用硬件和软件双冗余;一体化钻井仪表能实时准确显示参数指导司钻操作等完善措施,并提出电控系统成套的硬件和软件标准有待统一,在系统的标准化方面需开展工作的建议。

Considering the problems existing in ZJ30DBT, ZJ50DB and ZJ70DB electric drilling rigs with alternate current and variable frequency, such as the different standard of electric controlling system, unable stop of drawworks with large load, inverted rotating of rotary table, bad redundance feature of controlling system and backward meter parameter, the improved design of electric controlling system of 9 000 m drilling rig and other drilling rigs is carried out through analysis and study. The drawworks engine should use coded vector closed controlling and the rotary table should use anti-inverted rotating controlling and coring stable speed controlling. The controlling system should use dual redundance of hardware and software. The integrated drilling meters should display parameters and tendency in time and accurately to guide the driller. It is suggested that the hardware and software standards should be uniform and some work should be done in the standardization of the system.